I have a .txt file file.txt an html file called form.html and a php file called update.php.The form takes arabic contents from user and the update.php file saves the the form data in file.txtThe whole process is working fine but when i write english data in form it works fine but when i write arabic or persian characters it show Ø§ÛŒÙ† Ø§Ø³Øª Ø³ÙˆØ§Ù„ Ù…Ø§ in my txt file.can you help me write utf-8 (Arabic or persian) characters in a txt file using php